Latest writing

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3 Lessons from the Daily Stoic

I took the daily stoic challenge this summer. It is a 10-day program developed by author Ryan Holiday that will encourage you to implement ideas from the stoics into your daily live. Here are few things I learned during the challenge, if you read this I still…▷ read more

CKA Tips

IntroductionThe Linux foundation provides quite a few certifications and some of the most looked after in 2020 are related to Kubernetes. To this date there are 3 of them: Certified Kubernetes Developer (CKAD)Certified Kubernetes Administrator (CKA)Certified K…▷ read more

API Gateway & CORS

The problemSetting CORS while using AWS API Gateway can be confusing as the Enable CORS option in the Action menu doesn't work out of the box. The problem occurs during the pre-flight call that fail as it is. A solution to this issue is simply to create a…▷ read more

Tech radar

Interactive visualization of technologies and how they fit in past, present and future projects— based on the technology frontier radar by thoughtworks. It will be updated twice a year or so. For the best experienced go to…▷ read more

Run and Meditate

This is probably your situation too. I find very difficult to find enough time to take care of myself. Running and meditation have been for a long time some of the habits that I get most benefits from. Ideally, I like doing a 40 minutes seated meditation, but…▷ read more

Fundamentals ReactiveX

Event-driven architectures have been around for a while and lately its use has become popular in environments such as Node.js. One of the most expressive and graceful implementations of these ideas is ReactiveX. It was created from the idea of interfacing thre…▷ read more

Causality & Machine Learning

I consider this talk by Bernhard Schoelkopf at the Royal Society, London on causal relationships very interesting. He motivates the use of statistical methods for machine learning and then dives into the fascinating topic of causal modeling. One of the most ex…▷ read more

Prefer Myopic Feedback

This week, James Clear posted an interesting idea on How to effectively measure improvements. His main point was that it might be better approach to use short-term feedback to calibrate your actions and your probability of achieving your goals. Most people act…▷ read more

Book notes

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Seeking Wisdom by Peter Bevelin

from Darwin to MungerWisdom seeker makes an attempt to understand how the likes of naturalist Charles Darwin and super investor Charles Munger have achieved incredible clear thinking and the ideas influencing their decisions. He also looks into ways to improve…▷ read more

Atomic Habits by James Clear

Weightlifter, author, and habit building scholar teaches you how to train yourself to acquire/remove habits while avoiding common pitfalls and increasing the chances of obtaining long lasting results using his simple but powerful 4 laws of habit building and s…▷ read more

Rework by Jason Fried

A team of entrepreneurs (Jason Fried and DHH) write a book with all the quick and straightforward things you can do succeed when setting up a new business. They are advocates for small no-gimmicks business thinking and inspire readers into action with solid a…▷ read more

Anything You Want by Derek Sivers

World's most approachable entrepreneur narrates some of  the most valuable lessons he learnt while building his iconic company CDBaby. Finished: Jun 2017 Rating: ⭐⭐⭐⭐⭐ Get the book 👈 César D. Velandia’s review of Anything You Want4/5: Entertaining, unpretenti…▷ read more

Start Small Stay Small by Rob Walling

A software developer explains why doing marketing before writing your first line of code will improve your next startup chances of success. Finished: Mar 2017 Rating: ⭐⭐⭐⭐ Get the book 👈 César D. Velandia’s review of Start Small, Stay SmallA software develope…▷ read more

Escape from Cubicle Nation by P Slim

Cubicle escapist takes you step by step over the decision of leaving your 9 to 5 and building something that resonates with your personality and life goals, on your terms. Finished: May 2015 Rating: ⭐⭐⭐⭐ Get the book 👈 César D. Velandia’s review of Escape fro…▷ read more

Reference notes

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Getting startedImages are the blueprint to instantiate containers that are built, run, and distributed by the Docker Daemon, which used via a Docker Client and pull images from a registry such as Docker Hub Basic commands#runs a container (downloads image if n…▷ read more

Chaos Engineering

IntroductionMain objectives: Part of overall Resilience approachSurface evidence of weaknesses before crisis and outagesMake everyone responsible for code in productionImprove availability, stability, robustness, service in case of outagesAssess how well code…▷ read more


The most used container orchestration tool for deployment, scaling, and maintenance in the cloud. Notes are living documents and will change over time 🌱…▷ read more

Rust Libraries

NetworkingReqwest is an ergonomic, batteries-included HTTP Client for Rust. Plain bodies, JSON, urlencoded, multipart, Customizable redirect policy, HTTP Proxies, HTTPS via system-native TLS (or optionally, rustls), Cookie Store, WASM. Rustls is a modern TLS l…▷ read more


Getting startedInstall via script # install curl -aSf | sh source $HOME/.cargo/env export PATH="$HOME/.cargo/bin:$PATH" # check installation cargo -V rustc -V Create a template project via command cargo new --bin hello-world or cargo init…▷ read more


Basicsmove k h l j move between words words! _a_re words w words! are _w_ords e words! ar_e_ words b words_!_ are words B _w_ords! are words multipliers number + [h, j, k, l , w, e, b] 5h wor_d_s! are words…▷ read more